Linear Integrated Circuits (ICs) are electronic components that combine multiple functions into a single chip. They are designed to process continuous signals, making them essential in applications like audio amplification and signal conditioning. These circuits can perform tasks such as amplification, filtering, and voltage regulation, providing high performance in a compact form. Linear ICs typically use bipolar junction transistors (BJTs) or field-effect transistors (FETs) to achieve their functions. Common examples include operational amplifiers, voltage regulators, and analog multipliers. Their versatility and efficiency make them crucial in various devices, from smartphones to medical equipment.